What is the minimum volume (mL) of 4.00 M KOH required for the reaction below to go to completion (only products present at the end of the reaction) if 1.1798 g of aluminum foil is used?

2 Al(s) + 2 KOH(aq) + 6 H2O(l) → 2 KAl(OH)4(aq) + 3 H2(g)

why are electric switches and boards are made up of plastic

Because plastic is a poor conductor of electricity.

Plastics do not conduct enough heat and electricity. Therefore, it is used in the manufacture of plug switches, plug boards, etc.

The island was it before there were just two dodos left in 44 years.

The bird was first seen by Portuguese sailors around 1507 and was exterminated by humans and imported animals. The Dodo was extinct by 1681 the Reunion solitaire by 1746, and Rodriguez solitaire around 1790. The last dodo bird went extinct on the island of Mauritius more than 300 years before him. The Indian Ocean.

The last dodo bird was killed in 1681. Although the dodo bird's demise story is well documented no complete specimen of the bird has been preserved. There are only fragments and sketches. The dodo bird is just one of Mauritius's endangered bird species. Overharvesting of birds, combined with habitat loss and loss of competition from newly introduced animals, was just too much for the dodo to survive. The last dodo was killed in 1681 this species was forever endangered.

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The pressure at which the volume of the gas is 2000.0 mL is 0.2 atm.

An ideal gas is a theoretical gas composed of many randomly transferring factor particles that aren't difficult to interparticle interactions. the best gasoline idea is beneficial because it obeys the precise gas law, a simplified equation of country, and is amenable to evaluation under statistical mechanics.

Volume is a degree of occupied three-dimensional space. it's far more frequently quantified numerically the usage of SI-derived gadgets or by way of diverse imperial gadgets. The definition of length is interrelated with the extent.

An ideal gas is described as one for which both the extent of molecules and forces between the molecules are so small that they have got no effect on the behavior of the gas. The real gas that acts almost like a really perfect gasoline is helium. that is due to the fact helium, in contrast to maximum gases, exists as an unmarried atom, which makes the van der Waals dispersion forces as low as viable

Using the ideal gas equation:-

Given;

P₁ = 1

V₁ = 400 ml = 0.4 L

P₂ = ?

V₂ = 2000 ml = 2 L

P₁V₁ =P₂V₂/

P₂ = P₁V₁/  V₂

  = 1 ×  0.4 / 2

  = 0.2 atm

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The molar mass of a gas with a density of 1.02 g/L at 2.13 atm and a temperature of 20°C is 47.9 g/mol.The molar mass of an element or compound is the mass of one mole of that substance. A mole is the SI unit for the amount of a substance.

It's defined as the amount of a substance that contains the same number of entities as there are atoms in 12 grams of carbon-12.Molar mass (M) = mass (m) ÷ amount of substance (n)So, M = m/n

Where m is the mass in grams and n is the number of moles. The unit of molar mass is grams per mole (g/mol).

The ideal gas law is used to calculate the molar mass of a gas. The ideal gas law is:P V = n R T,Where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

Convert the density to grams per liter: 1.02 g/L.

The density is mass/volume, thus 1.02 g/L means that 1 liter of the gas weighs 1.02 g.

This means that 1 mole of gas will occupy 22.4 L (at standard temperature and pressure, STP).Calculate the number of moles of gas using PV = nRT.P = 2.13 atmV = 22.4 L (at STP)R = 0.0821 L·atm/K·molT = 273.15 K + 20 K = 293.15 K

Thus, n = PV/RT = (2.13 atm × 22.4 L)/(0.0821 L·atm/K·mol × 293.15 K) = 0.973 mol

Calculate the molar mass (M) using M = m/n.m = density × volume = 1.02 g/L × 22.4 L = 22.848 gM = m/n = 22.848 g/0.973 mol = 23.5 g/mol Convert to units of grams per mole: 23.5 g/mol

The molar mass of a gas with a density of 1.02 g/L at 2.13 atm and a temperature of 20°C is 47.9 g/mol.

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Answer:

3.09 moles C3H8 8.22 moles C3H8 1.03moles C3H8 6.58moles C3H8 9.73moles C3H3

One mole of every substance contains 6.02×10²³ atoms. The no.of moles of C₃H₈ containing 4.95×10²⁴ hydrogen atoms is 1.02 moles.

A substance which contains 6.02×10²³ atoms is called one mole of that substance.  C₃H₈ contains 8 hydrogens. The atomic mass of hydrogen is 1.008 g.

The number of hydrogen atoms in one mole of C₃H₈ = 1.008× 6.02×10²³

= 4.85×10²⁴  hydrogen atoms.

Thus the no.of moles of C₃H₈ that contains 4.95×10²⁴ hydrogen atoms is calculated as follows:

(4.95×10²⁴× 1)/4.85×10²⁴ = 1.02 moles.

Therefore, 1.02 moles of C₃H₈ contains 4.95×10²⁴ hydrogen atoms.

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Answer:

16

Explanation:

Because the sum of all electron in that compound should be 41 and as it has one electron extra ,total no. of electrons are 42 .

So if we add 26 +16 we get 42

Hence it's correct answer

Answer:

1 mole of ZnCl₂

Explanation:

Just from the stoichiometric equation/ balanced equation:

            Zn(s) + 2HCl(aq) → ZnCl₂(s) + H₂(g)

            1 mole   2 moles    1 mole       1 mole

Therefore: 2 moles of 2HCl produce 1 mole of ZnCl₂

Answer:

Explanation:

IUPAC nomenclature is based on naming a molecule's longest chain of carbons connected by single bonds, whether in a continuous chain or in a ring. All deviations, either multiple bonds or atoms other than carbon and hydrogen, are indicated by prefixes or suffixes according to a specific set of priorities.

Answer:

the study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behavior, origin, and distribution

Explanation:

the plants and animals of a particular area.

"the biology of Chesapeake Bay"

the physiology, behavior, and other qualities of a particular organism or class of organisms.

"human biology"

Answer:

awdaef

Explanation:

The total mass of the balloon and its content is 1521.17 g, the number of moles of CO₂ in the balloon is 34.15 mol, and the number of CO₂ molecules in the balloon is 2.06 x 10²⁵ molecules.

a) The molar mass of CO₂ is 44.01 g/mol. To find the total mass of the balloon and its content, we need to add the mass of the balloon (20g) to the mass of the CO₂ inside the balloon.

Mass of CO₂ = number of moles of CO₂ x molar mass of CO₂

Since the balloon is at STP (standard temperature and pressure), we can use the molar volume of a gas at STP (22.4 L/mol) to find the number of moles of CO₂ in the balloon:

Volume of CO₂ = Volume of balloon = 765 L (at STP)

Number of moles of CO₂ = volume of CO₂ / molar volume of a gas at STP

                                          = 765 L / 22.4 L/mol

                                          = 34.15 mol

Mass of CO₂ = 34.15 mol x 44.01 g/mol

                       = 1501.17 g

Total mass of balloon and its content = 20 g + 1501.17 g

                                                               = 1521.17 g

b) Number of moles of CO₂ in the balloon is 34.15 mol

c) To find the number of CO₂ molecules in the balloon, we need to use Avogadro's number (6.02 x 10²³ molecules/mol).

Number of CO₂ molecules = number of moles of CO₂ x Avogadro's number

                                           = 34.15 mol x 6.02 x 10²³ molecules/mol

                                           = 2.06 x 10²⁵ molecules

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The balanced chemical equation for the reaction between strontium and oxygen can be written as follows: 2 Sr (s) + \(O_2\)(g) → 2 SrO (s).

In this equation, solid strontium (Sr) reacts with gaseous oxygen (\(O_2\)) to produce solid strontium oxide (SrO).

To determine the mass of product expected to form in this reaction, we need to consider the molar ratio between strontium and strontium oxide. From the balanced equation, we can see that 2 moles of strontium react to produce 2 moles of strontium oxide.

The molar mass of strontium (Sr) is 87.62 g/mol, and the molar mass of strontium oxide (SrO) is 119.62 g/mol. Since the molar ratio is 1:1 between strontium and strontium oxide, the mass of strontium oxide formed will be equal to the mass of strontium used.

In this case, the student added 4.93 g of strontium to the crucible. Therefore, the expected mass of strontium oxide formed will also be 4.93 g.

It's important to note that this calculation assumes that the reaction proceeds to completion, meaning that all of the strontium reacts with oxygen. In actual laboratory conditions, the yield of the reaction may be less than 100% due to factors such as incomplete reaction, side reactions, or product loss.

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Answer:

6.02 x 10∧23

Explanation:

B. The movement of basketball players on a court of the following is an example of quantization

The process of translating continuously infinite values to a more manageable collection of discontinuous finite values is known as quantization. It involves estimating real-world values with a digital representation that places restrictions on a value's precision and range in the context of simulation and embedded computing.

As a general guideline, quantize to the note you've played that is the shortest; for example, if the phrase contains both eighth and quarter notes, use eighth note resolution. Keep in mind that many rhythms may really employ triplets; if things aren't working out, you may try utilising a triplet resolution.

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Answer: The half-life of the compound is 93 minutes

Explanation:

Expression for rate law for first order kinetics is given by:

\(t=\frac{2.303}{k}\log\frac{a}{a-x}\)

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant =100

a - x = amount left after decay process = (100-36) = 64

a) for completion of 36 % of reaction

\(60=\frac{2.303}{k}\log\frac{100}{100-36}\)

\(k=\frac{2.303}{60}\log\frac{100}{64}\)

\(k=0.0074min^{-1}\)

b) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

\(t_{\frac{1}{2}}=\frac{0.693}{k}\)

\(t_{\frac{1}{2}}=\frac{0.693}{0.0074min^{-1}}=93min\)

The half-life of the compound is 93 minutes

Answer:

conservation of mass

Explanation:

rubbing it against your hair

Answer:

C

Explanation:

Hope this helps and have a great day.

Over-exploitation of forests has the serious environmental effects such as deforestation, destruction of ecosystems and animal habitats, accelerated soil erosion among others.

Air pollution occurs from burning of energy sources.

That source was fossil fuels , coal, oil, and natural gas, though coal led way, formed underground from remains of plants and animals from much earlier geologic times.

By mid-19th century, industrial revolution brought significant shift in energy sources with the usage of coal, mainly for steam engines, but increasingly for power plants.

The use of thermal energy to generate mechanical energy was core driver of this transformation.

Before industrial revolution our energy needs were modest.

For heat, we relied on the sun, and burned wood, straw, and dried dung when sun failed us.

For transportation, muscle of horses and power of the wind in our sails took us to every corner of the world.

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Prior to 1982, penny dates' history

Years            weight (Mass)

\(1793-95\)       \($13.48 \mathrm{gm}$\)

\($1795-1857$\)   \($10.89 \mathrm{gm}$\)

\($1856-1864$\)   \($4.67 \mathrm{gm}$\)

\($1864-1942$\)   \($3 \cdot 11 \mathrm{gm}$\)

\(1943$\\\)               \($2.72 \mathrm{gm}$\)

\($1944-46 \quad\)       \(3.11 \mathrm{gm}$\)

\($1947-62$\)          \($3 \cdot 11 \mathrm{gm}\)

\($1962-82 \quad\)       \(3.11 \mathrm{gm}$\)

How many pennies are post-1982 in number

Years                            weight (Mass)

\(1982 - present $\quad\)               \(2.5 \mathrm{gm}$\)

Then,

(C) Total no. of pennies =( No. g pennies duted before 1982)

+(No.g pernies duted after 1982) \($=(8+1)$\)

Total no. of Pennies =9

Over the past ten years, the cost of copper has more than doubled. Therefore, depending on the metal it contains, a penny made before 1982 is worth 2.2 cents. The U.S. Mint banned the melting down of pennies for financial gain in 2007.

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#1

Subtract no of electrons from no of protons

Ion A has -2 charge

#2

No of protons=6

No of electrons=6

The reaction of 2,2-dichloro-3-methylbutane with water results in the formation of 3-methyl-2-butanol, which can react with OH- in a nucleophilic substitution reaction to form 3-methyl-2-butyl alcohol and water.

The reaction can be represented by the following equation:

2,2-dichloro-3-methylbutane + H2O → 3-methyl-2-butanol + H+ + Cl-

The reaction of 2,2-dichloro-3-methylbutane with water can result in the formation of an alcohol and a hydrogen ion. The product of this reaction is 3-methyl-2-butanol.

The reaction can be represented by the following equation:

2,2-dichloro-3-methylbutane + H2O → 3-methyl-2-butanol + H+ + Cl-

In this reaction, one of the chlorine atoms from 2,2-dichloro-3-methylbutane is replaced by a hydroxyl group (-OH) from water, resulting in the formation of an alcohol group (-OH) in the product, 3-methyl-2-butanol. The other chlorine atom remains as an ion, Cl-.

The product, 3-methyl-2-butanol, can react with OH- in a nucleophilic substitution reaction. In this reaction, the hydroxide ion (OH-) acts as a nucleophile and attacks the carbon atom that is attached to the leaving group (the -OH group) in the 3-methyl-2-butanol molecule. The leaving group then departs with its pair of electrons, forming a new bond with the nucleophile (OH-). The result is the formation of a new alcohol molecule.

The reaction can be represented by the following equation:

3-methyl-2-butanol + OH- → 3-methyl-2-butyl alcohol + H2O

In this reaction, the -OH group of 3-methyl-2-butanol is replaced by the hydroxide ion (OH-) to form 3-methyl-2-butyl alcohol, and a water molecule is formed as a byproduct.

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Answer:

DUDE ITS THE THIRD ANSWER FROM THE TOP

....... HOPE THIS HELPS ✌

Sedimentation, filtration, and coagulation are the treatments that will help remove contaminants from minerals or from the pipes carrying water from a source.

Sedimentation is a process in which suspended particles settle out of water. It is one of the most basic techniques for removing particles from water. As particles settle, they become trapped in the bottom of a container or settle to the ground in an outdoor setting

Filtration is a method of removing particles from a fluid. It is a physical or chemical separation method that separates solids from fluids (liquids or gases) by adding a medium through which only the fluid can pass.

Coagulation is the process of using chemicals to remove contaminants from water. By creating a chemical reaction, coagulation destabilizes particles and causes them to clump together. This helps to remove the contaminants from the water.

Disinfection is the process of eliminating or destroying pathogens that cause infection. Disinfection eliminates harmful microorganisms by destroying or inactivating them. The disinfectant is a chemical or physical agent that is used to destroy or inactivate harmful microorganisms.

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Answer:

1.67

Explanation:

Mass÷mr=moles

3÷18=1.67

Answer: The correct answer for the question would need to be 160 k

Explanation: I used the answer that was posted and it was inincorrect so I solved it myself to get the correct one

Lead levels in plankton and algae are high, mostly as a result of environmental pollution brought on by human activity. While it is true that some brown algae species have the ability to accumulate heavy metals like lead.

Plankton and algae have high levels of lead, mostly as a result of environmental contamination brought on by human activities including mining, industrial operations, and the burning of fossil fuels.

Due to the fact that plankton and algae take up trace quantities of lead from the surrounding water, their tissues contain greater concentrations of the metal.

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The solution has a molarity of 0.125 M.

Molarity (M), which is determined by dividing the solute's mass in moles by the volume of the solution in liters, is the most often used unit to represent solution concentration: liters of solution/moles of solute equals M.

We must first determine how many moles of CuCl2 there are in one liter of solution in order to compute the molarity of the solution, which is given by:

moles of CuCl2 = 0.25 moles

volume of solution = 2.0 L

Molarity (M)=moles of solute/liters of solution

Molarity (M) = 0.25 moles / 2.0 L

Molarity (M) = 0.125 mol/L

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1.54 × 10²⁴ atoms He

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[Given] 2.56 moles He

[Solve] atoms He

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

1.54163 × 10²⁴ atoms He ≈ 1.54 × 10²⁴ atoms He